[Openstack-stable-maint] Stable check of openstack/oslo.messaging for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/8d6283d01c5d490f83ddcf1729530e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a9f5ecb8df8a45699fe031ccf4d80a15 : SUCCESS in 4m 30s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a15c72ec52764a5daa5952a7c53dc481 : SUCCESS in 5m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/bda4f641c0db4712bd558144956df466 : SUCCESS in 5m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/737eb5583bba49c885bbb8a24df8bf74 : FAILURE in 4m 17s